diff --git a/main.tf b/main.tf
index da79b14..f055da4 100644
--- a/main.tf
+++ b/main.tf
@@ -134,6 +134,7 @@ resource "google_cloudfunctions_function" "main" {
   region                      = var.region
   service_account_email       = var.service_account_email
   build_environment_variables = var.build_environment_variables
+  build_service_account       = var.build_service_account
   docker_registry             = var.docker_registry
   docker_repository           = var.docker_repository
   kms_key_name                = var.kms_key_name
diff --git a/variables.tf b/variables.tf
index fee2e9b..0bef82f 100644
--- a/variables.tf
+++ b/variables.tf
@@ -125,6 +125,12 @@ variable "service_account_email" {
   description = "The service account to run the function as."
 }
 
+variable "build_service_account" {
+  type        = string
+  default     = ""
+  description = "The self-provided service account to use to build the function. The format of this field is projects/{project}/serviceAccounts/{serviceAccountEmail}"
+}
+
 variable "bucket_name" {
   type        = string
   default     = ""
diff --git a/versions.tf b/versions.tf
index ad86647..9d53299 100644
--- a/versions.tf
+++ b/versions.tf
@@ -20,7 +20,7 @@ terraform {
 
     google = {
       source  = "hashicorp/google"
-      version = ">= 4.23, < 7"
+      version = ">= 5.39, < 7"
     }
     null = {
       source  = "hashicorp/null"